When you load jconsole with no profile, .0 0[A[B is the sentence executed upon start-up. where A are stands for setting ARGV_z_ and B for setting BINPATH_z_. I am guessing the resulting i. 0 0 is just a way of simulating what in other languages would be known as NoOp. If that's the case indeed, what are there other constructs to get the same end result?